Welding stainless steel to titanium
Welding stainless steel to titanium
(OP)
Dear Expert,
I need some advise.
Is there have any possibility to weld stainless steel plate (SUS304) to titanium pipe (TP340) by gtaw process?
If so, please advise me the suitable filler rod for this welding.
I need some advise.
Is there have any possibility to weld stainless steel plate (SUS304) to titanium pipe (TP340) by gtaw process?
If so, please advise me the suitable filler rod for this welding.





RE: Welding stainless steel to titanium
RE: Welding stainless steel to titanium
Dik
RE: Welding stainless steel to titanium
Buy some explosively bonded plate strips, weld the 304L side to the plate and the Ti side to your pipe.
This is how Al superstructure is welded to steel ships.
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P.E. Metallurgy, Plymouth Tube
RE: Welding stainless steel to titanium
Best regards - Al
RE: Welding stainless steel to titanium
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P.E. Metallurgy, Plymouth Tube
RE: Welding stainless steel to titanium
Dik
RE: Welding stainless steel to titanium
If you haven't been exposed to it before, explosive welding of plates is a terribly interesting topic to read up on.
RE: Welding stainless steel to titanium
Dik
RE: Welding stainless steel to titanium
These guys near me do it a lot: http://www.highenergymetals.com/
But there are other methods:
A shop I worked for used to weld titanium-to-stainless adapters onto stainless propellant valve inlets for rocket thrusters, so that the spacecraft fitters could weld on their titanium lines. These adapters were made by friction welding, essentially ramming the two tube stubs together, one held stationary and the other spinning in a lathe, and then trimming them up after. We ran very long term tests over many years confirming that the welded adapters were as corrosion resistant (passive to hydrazine fuels) as their parent materials. https://en.wikipedia.org/wiki/Friction_welding
Magnetic pulse welding is supposed to be capable of bonding dissimilar materials also. https://en.wikipedia.org/wiki/Magnetic_pulse_weldi...
Friction stir welding has also apparently been used for dissimilar materials (aluminum and galvanized steel) in some automotive applications, and there is a lot of research over the past ten years or more on the subject.
RE: Welding stainless steel to titanium
Dik
RE: Welding stainless steel to titanium
RE: Welding stainless steel to titanium
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P.E. Metallurgy, Plymouth Tube
RE: Welding stainless steel to titanium
All kidding aside, there are solid state processes like diffusion bonding that can produce sound joints between dissimilar metals like titanium and 304 stainless. Unfortunately, diffusion bonding requires specialized equipment (like a HIP chamber) and very careful processing to produce good results. The size of the weldment will also be limited since most HIP chambers are fairly small. If you really need to make the final connection by GTAW, you might consider making a short diffusion bonded Ti/304 adapter that can be GTAW welded between the stainless plate and titanium pipe.
Here's a technical reference on the subject. https://www.ijerst.com/view.php?iid=237